Oil filter



D. T. EVES El' AL Nov. Il, 1947.

OIL FILTER Original Filed June 30. 1942 l Nv. f @v .nw .mw M x. f ww w@filter.

Patented ov. l1, 1947 as'r'ras OIL FILTER of New Jersey Continuation ofapplication Serial No. 449,106, June 30, 1942. This application May 8,1944,

Serial No. 534,568

a claims.` (ci. 21o- 169) This application is a continuation of ourcopending application Serial No. 449,106 led June 30, 1942, for Oilfilters, allowed March 10, 1944, and the invention herein relates to afilter constructed of porous fibrous sheet material in a desirableeconomical form particularly adapted for ltering lubricating oil ininternal combustion engines.

The principal object of the invention is to provide an effective ltexingdevice utilizingflbrou sheet material.

Another object is to construct a lter using such material in such amanner that no support is lnecessary for the sheet material.

Another object is to provide a large filtering area in small space. l

These objects and others which will be apparent are accomplished byconstructions such as shown in the drawings, in which Figure 1 shows afilter casing partially broken away in section to show a filter elementand A-meansfor mountingit in the casing;

Figure 2 is a similar view showing a modification Figure 3 is a sectiontaken on the line 3`3 of Figure 2.

Figure 1 shows a conventional filter base I0 of a type which is widelylused with internal combustion engines. A means, either cored in theengine block or provided by a conduit delivers oillto an inlet passage II which terminates within the outer portion of the base I0. I2, alsoformed in the base at the lower portion thereof, receives clean cil fromthe filter through a conduit I3 formed in a central clamping bolt I4.Said bolt is utilized for clamping a removable containing shell I5 inposition to form a Said shell is fitted with gaskets to form anoil-tight compartment capable of withstanding the oil pressure withoutleakage.4

The description of the lter base and casing up to this point applies toboth modifications as shown in Figures 1 and 2.

In the form of filtering device shown in Figure 1 the clamping bolt I4is provided with a shoulder I6 near thelower end. A sleeve I'Ifrictonally fitting the b'olt I4 is seated against the shoulder I6. Saidshoulder is formed as an annular element threaded on the bolt I4 wherebyit maybe moved for removal of the sleeve I1 and the filter elementcarried thereby. An annular collar I1 is secured to the sleeve Il toform a lowerabutment for the ltering .cef-.- tions IB. Each section isformed of two nested cups of brous sheet material abutting each Achamber` other, the sections being spaced radially from each other. Attheir upper ends the sections I8 are secur'd together by sewing, gluing,or other means, to seal oil the upper end. At their low'er ends each ofthe sections I8 embraces a spacer ring I9, the two adjacent walls beingspread to engage the outer faces of the respective spacing ring. Thefirst section is abuttedv againstthe collar Il' with the correspondingsections iitted over the sleeve il in contact with one another. upperend of the sleeve Il and secured in position to clamp the sections inposition. The spacer rings I9 are perforated to provide for the escapeof oil through aligned openings 22 in the sleeve l1. The bolt I6 in thisform of device has an annular recess 23 provided in the vicinity of theopenings 22 to provide for the ilow of oil from the filter sections. Anopening 24' communicates between the recess 23 and the conduit I3through which filtered oil is delivered. The lter sections I8, aspreviously mentioned, are built up of relatively thin, brous, sheetlikematerial. The two adjacent walls abut each other and are inherently, dueto the nature of the material, somewhat rough on the surface. Thisroughened surface provides for the ow of clean oil filtered through thewalls. Said ltered oil passesdownwardly andA escapes through thespacing' elements I9. This filter is an improvement of the filter shownin the copending application Serial No. 231,954, led September 27, 1938,now Patent No. 2,337,579, issued December 28, 1943 which disclosesself-supporting walls of thin brous material capable of withstandingrelatively high filter pressures due to the abutting walls whichwithstand the pressure due to their contact with each other.The'roughened material used in lter elements of this type providessuilicient fdowing space for the clean. ltered oil even when theelements are pressed together with lter pressures as high as 50 topounds per square inch. The filters operate successfully at any oilpressures utilized in Ainterna] combustion engines.

It will be noted in Figure 1 that the sections I8 are spaced from theshell I5 and from each other .a considerable distance. This space isprovided to give the lter long life as during operation the materialltered from the oil builds up to a considerable thickness on the illtersurface.

In the modification shown in Figure 2, a sleeve 25 provided with ashoulder 26 is tted into a bore 21 formed in the base I0. Said sleeveeX- tcnds vertically practically the extent of the shell.

An upper collar 20 is fitted on the 3 i 5 and is provided at the upperend with a re duced portion 28 which forms a shoulder 29. A disklikeclamping member 30 is seated on said shoulder. A spacer 3|, which may beof resilient material, is seated on the clamping member 30. A secondclamping member 32 is seated on the spacer 3l. The members 30 and 32 areprovided at -their periphery with angularly, downturned anges 33 and 3i.Said flanges engage and clamp a ange 35 Vformed on a iilter element wall36 and a ange 31 formed on a filter element wall 38 against an annularperforated spacer member 39. The ,upper end of the reduced portion 28 ofthe sleeve 25 is turned over the upper spacer member 32 to clamp thefiltering walls persuiiiciently smaller to be slid into the member 38during assembly. As shown in Figure 3, said lter Walls are star-shapedor undulated in cross section throughout the major portion of theirlength, being formed circular at their upper ends to provide for theflanges 35 and 31. The lower ends of the walls are secured together bysewing or gluing in any suitable manner to seal the ends against theescape of oil. The filtered oil which has passed through the walls owsbetween the abutting walls upwardly and out through the spacer member 39and the spacer 3|. Openings in the spacer 3| are aligned with openingsin the reduced end portion 28 of the sleeve 25 to allow the oil toescape into space between the sleeve 25 and the bolt i4. The ltered oilthen passes through a cross conduit 4I into the conduit 3 in the boltI4.

The iilter walls 36 and 38 and the spaced clamping members 3U and 32form a cup-shaped element having a flat end or bottom portion and agenerally cylindrical wall portion. The element so formed is invertedwith respect to the plurality of elements formed by the cup-shapedsections of Figure 1. A large filtering area is obtained in theconstruction shown in Figure 1 by a plurality of sections, while in theconstruction shown in Figures 2 and 3 the surface is undulated for thesame purpose. In either form a large iiltering area may be obtained in arelatively small casing.

Applicants have shown only two preferred embodiments of theirimprovement in filters, but it is understood that all modicationsfalling within the scope of the appended-claims are considered a part oftheir invention.

What is claimed is:

l. In a lter construction having a base, a shell fitted over said base,a bolt extending through the shell and threaded into the base, means fordelivering unliltered liquid into the shell, said bolt being formed witha bore at the bottom end thereof, and means formed in the base forreceiving iiltered liquid from said bore; the combination therewith of afilter assembly including a sleeve member mounted within the shell inconcentric contact with said bolt and having side Wall opening Ameans incommunication with said bolt bore, a plurality of spaced cup-shapedfilter sections each lhaving a, hole in its bottom portion surroundingsaid sleeve member, said filter sections including double contactingself-supporting walls having edge portions bounding the bottom holes,

l and clamping means about the sleeve member for securing said wall edgeportions of each section in spread relation to the sleeve and inregistry with said sleeve side wall opening means to provide for theescape of liquid that has filtered through said walls into the spacetherebetween.

2. In a liquid filtering device comprising a liquid-containing casinghaving a base, a shell upon f said base,and a bolt extending through theshell into engagement with the base for holding the shell thereon andsaid bolt yhaving a channel nearits lower end for conducting filteredfluid outwardly of the device; the combination of a cup-shaped envelopeincludinginner and outer side walls through which liquid within Ythecasing is lterable into the envelope, said cup-shaped envelopebeingarranged upright ln the casing with its bottom portion adjacentlyto said/base, the envelope bottom portion containing a hole surroundingthe bolt and bordered by side wall edge portions spreadable axially ofthe envelope, a sleeve sealed onto and about said bolt and also disposedwithin said envelope hole, said sleeve containing a side wall aperturein communication With the bolt channel, a spreader ring about saidsleeve, said spreader ring being disposed Within the envelope betweenthe wall edge portions about said hole to spread the same and containinga radial opening communicating between the interior of the envelope andthe sleeve aperture, and means for clamping said wall edge portionsaxially onto their respective ends of the spreader ring,

3. In a liquid ltering device comprising a liquid-containing casinghaving a base, a shell upon said base, and a bolt extending through theshell into engagement with the base for holding the shell thereon andsaid bolt having a channel near its lower end for conducting 'filteredfluid outwardly of the device; the combination of a cup-shaped envelopeincluding inner and outer side Walls through which liquid within thecasing is iilterable into the envelope, said cup-shaped envelope beinginverted in the casing with its bottom portion spaced upwardly from saidbolt channel, the envelope bottom portion containing a hole surroundingthe bolt and bordered by side wall edge portions spreadable axially ofthe envelope, a sleeve disposed about said bolt to cooperate therewithin the formation of an axial channel communicating between the boltchannel and an upper interior portion of the sleeve, said upper portionof the sleeve being in registry with the bottom of the envelope andhaving a side-wall aperture communicating with said axial channel, aspreader ring about said sleeve upper portion, said spreader ring beingdisposed within the envelope between the Wall edge portions about saidhole to spread the same and containing a radial opening communicatingbetween the interior of the envelope and the sleeve aperture, and meansfor clamping said wall edge portions axially onto their respective endsof the spreader ring.

DONALD T. EVES. RAYMON BOWERS.

REFERECES CITED The following references are of record in the le of thispatent:

UNITED STATES PATENTS Number Name Date 2,278,603 Williams Apr. 7, 19422,298,980 Sloan et al Oct. 13, i942 2,349,469 Sloan May 23, 1944

